🛡️ CVE-2024-20363 — firepower-threat-defense

🟡 CVSS 5.8 — Medium ✅ No Known Exploit CWE-290 NVD
5.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Multiple Cisco products are affected by a vulnerability in the Snort Intrusion Prevention System (IPS) rule engine that could allow an unauthenticated, remote attacker to bypass the configured rules on an affected system. This vulnerability is due to incorrect HTTP packet handling. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured IPS rules and allow uninspected traffic onto the network.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality none, integrity low, availability none.

Weakness class

CVE-2024-20363 is classified as CWE-290: Authentication Bypass by Spoofing. Identity is inferred from something an attacker can forge, such as a header or address.

Affected software

CVE-2024-20363 is recorded against 3 packages.

  • firepower-threat-defense
  • snort (from 3.0.0-233 up to 3.1.69.0)
  • unified-threat-defense-snort-intrusion-prevention-system-engine

Timeline and source

Published on 22 May 2024 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

sec.cloudapps.cisco.com
sec.cloudapps.cisco.com

Details

Severity MEDIUM
CVSS Score 5.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CWE CWE-290
Public Exploit ✅ No
Source NVD
Published 2024-05-22
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
firepower-threat-defense — —
snort 3.0.0-233 3.1.69.0
unified-threat-defense-snort-intrusion-prevention-system-engine — —

Similar Threats

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